Welcome to Niel's Chess

A quantum chess adventure for curious minds—10 to 99 and beyond.

I. Play online

Coming soon...

II. Rulebooks for variants

Main rules - EN, DE

↳ AI-generated translations: FR, IT, ES, PT, CN, HU

↳ Video rulebook: EN

Hadamard game - EN, DE

Poker-style game - EN, DE

Notes:
- Both players act as observers whenever the superposition state of a piece collapses. The position on the chessboard reflects all knowable spatial information.
- The concept of “collapse” is left open to interpretation—such as objective collapse, observer-induced collapse, or apparent collapse due to decoherence.

III. YouTube videos

Explaining the rules + playing a game (with OrcaChess)

Niel's Chess for education (AI for Good, ITU / UN 🇺🇳)

IV. Publication

T. Varga, Niel's Chess: A Quantum Game for Schools and the General Public
2024 IEEE International Conference on Quantum Computing and Engineering (QCE)
Montreal, QC, Canada, 2024, vol. 3, pp. 53-60

V. How to buy

Visit our webshop.